Examples of ch.ethz.ssh2.packets.TypesReader

ch.ethz.ssh2.packets.TypesReader
TypesReader. @author Christian Plattner, plattner@inf.ethz.ch @version $Id: TypesReader.java,v 1.6 2006/08/31 20:04:29 cplattne Exp $


  private void readStatus() throws IOException
  {
    byte[] resp = receiveMessage(34000);


    TypesReader tr = new TypesReader(resp);
    int t = tr.readByte();
    listener.read(Packet.forName(t));


    // Search the pending queue
    OutstandingStatusRequest status = pendingStatusQueue.remove(tr.readUINT32());
    if (null == status)
    {
      throw new RequestMismatchException();
    }


    // Evaluate the answer
    if (t == Packet.SSH_FXP_STATUS)
    {
      // In any case, stop sending more packets
      int code = tr.readUINT32();
      if (log.isDebugEnabled())
      {
        String[] desc = ErrorCodes.getDescription(code);
        log.debug("Got SSH_FXP_STATUS (" + status.req_id + ") (" + ((desc != null) ? desc[0] : "UNKNOWN") + ")");
      }
      if (code == ErrorCodes.SSH_FX_OK)
      {
        return;
      }
      String msg = tr.readString();
      listener.read(msg);
      throw new SFTPException(msg, code);
    }
    throw new PacketTypeException(t);
  }

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  private void readPendingReadStatus() throws IOException
  {
    byte[] resp = receiveMessage(34000);


    TypesReader tr = new TypesReader(resp);
    int t = tr.readByte();
    listener.read(Packet.forName(t));


    // Search the pending queue
        OutstandingReadRequest status = pendingReadQueue.remove(tr.readUINT32());
        if (null == status)
    {
      throw new RequestMismatchException();
    }


    // Evaluate the answer
    if (t == Packet.SSH_FXP_STATUS)
    {
      // In any case, stop sending more packets
      int code = tr.readUINT32();
      if (log.isDebugEnabled())
      {
        String[] desc = ErrorCodes.getDescription(code);
        log.debug("Got SSH_FXP_STATUS (" + status.req_id + ") (" + ((desc != null) ? desc[0] : "UNKNOWN") + ")");
      }
      if (code == ErrorCodes.SSH_FX_OK)
      {
        return;
      }
            if (code == ErrorCodes.SSH_FX_EOF)
            {
                return;
            }
      String msg = tr.readString();
      listener.read(msg);
      throw new SFTPException(msg, code);
    }
    throw new PacketTypeException(t);
  }

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      return;
    }


    ServerAuthenticationCallback cb = state.cb_auth;


    TypesReader tr = new TypesReader(msg, 0, msglen);
    int packet_type = tr.readByte();


    if (packet_type == Packets.SSH_MSG_USERAUTH_REQUEST)
    {
      String username = tr.readString("UTF-8");
      String service = tr.readString();
      String method = tr.readString();


      if (!"ssh-connection".equals(service))
      {
        sendresult(AuthenticationResult.FAILURE);
        return;
      }


      if ("none".equals(method))
      {
        if (cb != null)
        {
          sendresult(cb.authenticateWithNone(state.conn, username));
          return;
        }
      }


      if ("password".equals(method))
      {
        boolean flag_change_pass = tr.readBoolean();


        if (flag_change_pass)
        {
          sendresult(AuthenticationResult.FAILURE);
          return;
        }


        String password = tr.readString("UTF-8");


        if (cb != null)
        {
          sendresult(cb.authenticateWithPassword(state.conn, username, password));
          return;

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{
  private static final Logger log = Logger.getLogger(DSASHA1Verify.class);


  public static DSAPublicKey decodeSSHDSAPublicKey(byte[] key) throws IOException
  {
    TypesReader tr = new TypesReader(key);


    String key_format = tr.readString();


    if (key_format.equals("ssh-dss") == false)
      throw new IllegalArgumentException("This is not a ssh-dss public key!");


    BigInteger p = tr.readMPINT();
    BigInteger q = tr.readMPINT();
    BigInteger g = tr.readMPINT();
    BigInteger y = tr.readMPINT();


    if (tr.remain() != 0)
      throw new IOException("Padding in DSA public key!");


    return new DSAPublicKey(p, q, g, y);
  }

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    {
      rsArray = sig;
    }
    else
    {
      TypesReader tr = new TypesReader(sig);


      String sig_format = tr.readString();


      if (sig_format.equals("ssh-dss") == false)
        throw new IOException("Peer sent wrong signature format");


      rsArray = tr.readByteString();


      if (rsArray.length != 40)
        throw new IOException("Peer sent corrupt signature");


      if (tr.remain() != 0)
        throw new IOException("Padding in DSA signature!");
    }


    /* Remember, s and r are unsigned ints. */

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{
  private static final Logger log = Logger.getLogger(RSASHA1Verify.class);


  public static RSAPublicKey decodeSSHRSAPublicKey(byte[] key) throws IOException
  {
    TypesReader tr = new TypesReader(key);


    String key_format = tr.readString();


    if (key_format.equals("ssh-rsa") == false)
      throw new IllegalArgumentException("This is not a ssh-rsa public key");


    BigInteger e = tr.readMPINT();
    BigInteger n = tr.readMPINT();


    if (tr.remain() != 0)
      throw new IOException("Padding in RSA public key!");


    return new RSAPublicKey(e, n);
  }

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    return tw.getBytes();
  }


  public static RSASignature decodeSSHRSASignature(byte[] sig) throws IOException
  {
    TypesReader tr = new TypesReader(sig);


    String sig_format = tr.readString();


    if (sig_format.equals("ssh-rsa") == false)
      throw new IOException("Peer sent wrong signature format");


    /* S is NOT an MPINT. "The value for 'rsa_signature_blob' is encoded as a string
     * containing s (which is an integer, without lengths or padding, unsigned and in
     * network byte order)." See also below.
     */


    byte[] s = tr.readByteString();


    if (s.length == 0)
      throw new IOException("Error in RSA signature, S is empty.");


    if (log.isDebugEnabled())
    {
      log.debug("Decoding ssh-rsa signature string (length: " + s.length + ")");
    }


    if (tr.remain() != 0)
      throw new IOException("Padding in RSA signature!");


    return new RSASignature(new BigInteger(1, s));
  }

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                continue;
            }


            if(type == Packets.SSH_MSG_DEBUG) {
                if(log.isDebugEnabled()) {
                    TypesReader tr = new TypesReader(msg, 0, msglen);
                    tr.readByte();
                    tr.readBoolean();
                    StringBuilder debugMessageBuffer = new StringBuilder();
                    debugMessageBuffer.append(tr.readString("UTF-8"));


                    for(int i = 0; i < debugMessageBuffer.length(); i++) {
                        char c = debugMessageBuffer.charAt(i);


                        if((c >= 32) && (c <= 126)) {
                            continue;
                        }
                        debugMessageBuffer.setCharAt(i, '\uFFFD');
                    }


                    log.debug("DEBUG Message from remote: '" + debugMessageBuffer.toString() + "'");
                }
                continue;
            }


            if(type == Packets.SSH_MSG_UNIMPLEMENTED) {
                throw new IOException("Peer sent UNIMPLEMENTED message, that should not happen.");
            }


            if(type == Packets.SSH_MSG_DISCONNECT) {
                TypesReader tr = new TypesReader(msg, 0, msglen);
                tr.readByte();
                int reason_code = tr.readUINT32();
                StringBuilder reasonBuffer = new StringBuilder();
                reasonBuffer.append(tr.readString("UTF-8"));


        /*
         * Do not get fooled by servers that send abnormal long error
         * messages
         */

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    log.debug("Sending SSH_FXP_OPEN...");
    sendMessage(Packet.SSH_FXP_OPEN, req_id, tw.getBytes());


    byte[] resp = receiveMessage(34000);


    TypesReader tr = new TypesReader(resp);


    int t = tr.readByte();
    listener.read(Packet.forName(t));


    int rep_id = tr.readUINT32();
    if (rep_id != req_id)
    {
      throw new IOException("The server sent an invalid id field.");
    }


    if (t == Packet.SSH_FXP_HANDLE)
    {
      log.debug("Got SSH_FXP_HANDLE.");
      return new SFTPv3FileHandle(this, tr.readByteString());
    }


    if (t != Packet.SSH_FXP_STATUS)
    {
      throw new IOException("The SFTP server sent an unexpected packet type (" + t + ")");
    }


    int errorCode = tr.readUINT32();
    String errorMessage = tr.readString();
    listener.read(errorMessage);
    throw new SFTPException(errorMessage, errorCode);
  }

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        break;
      }


      // Receive a single answer
      byte[] resp = receiveMessage(34000);
      TypesReader tr = new TypesReader(resp);


      int t = tr.readByte();
      listener.read(Packet.forName(t));


      // Search the pending queue
      OutstandingReadRequest req = pendingReadQueue.remove(tr.readUINT32());
      if (null == req)
      {
        throw new IOException("The server sent an invalid id field.");
      }
      // Evaluate the answer
      if (t == Packet.SSH_FXP_STATUS)
      {
        /* In any case, stop sending more packets */


        int code = tr.readUINT32();
        String msg = tr.readString();
        listener.read(msg);


        if (log.isDebugEnabled())
        {
          String[] desc = ErrorCodes.getDescription(code);
          log.debug("Got SSH_FXP_STATUS (" + req.req_id + ") (" + ((desc != null) ? desc[0] : "UNKNOWN") + ")");
        }
        // Flag to read all pending requests but don't send any more.
        errorOccured = true;
        if (pendingReadQueue.isEmpty())
        {
          if (ErrorCodes.SSH_FX_EOF == code)
          {
            return -1;
          }
          throw new SFTPException(msg, code);
        }
      }
      else if (t == Packet.SSH_FXP_DATA)
      {
        // OK, collect data
        int readLen = tr.readUINT32();


        if ((readLen < 0) || (readLen > req.len))
        {
          throw new IOException("The server sent an invalid length field in a SSH_FXP_DATA packet.");
        }


        if (log.isDebugEnabled())
        {
          log.debug("Got SSH_FXP_DATA (" + req.req_id + ") " + req.serverOffset + "/" + readLen
              + " (requested: " + req.len + ")");
        }


        // Read bytes into buffer
        tr.readBytes(req.buffer, req.dstOffset, readLen);


        if (readLen < req.len)
        {
          /* Send this request packet again to request the remaing data in this slot. */
          req.req_id = generateNextRequestID();

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Basic

BasicWithHTTPProxy

ch.ethz.ssh2.auth.AuthenticationManager

ch.ethz.ssh2.auth.ServerAuthenticationManager

ch.ethz.ssh2.channel.ChannelManager

ch.ethz.ssh2.channel.LocalAcceptThread

ch.ethz.ssh2.Connection

ch.ethz.ssh2.ConnectionInfo

ch.ethz.ssh2.crypto.cipher.BlockCipher

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